WO2014012241A1 - Side-mounted current transform measuring structure and measuring method - Google Patents

Side-mounted current transform measuring structure and measuring method Download PDF

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Publication number
WO2014012241A1
WO2014012241A1 PCT/CN2012/078919 CN2012078919W WO2014012241A1 WO 2014012241 A1 WO2014012241 A1 WO 2014012241A1 CN 2012078919 W CN2012078919 W CN 2012078919W WO 2014012241 A1 WO2014012241 A1 WO 2014012241A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
measuring
conductive cable
measuring method
measured
Prior art date
Application number
PCT/CN2012/078919
Other languages
French (fr)
Chinese (zh)
Inventor
宁文源
贾超晨
宁远
Original Assignee
Ning Wenyuan
Jia Chaochen
Ning Yuan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ning Wenyuan, Jia Chaochen, Ning Yuan filed Critical Ning Wenyuan
Priority to PCT/CN2012/078919 priority Critical patent/WO2014012241A1/en
Publication of WO2014012241A1 publication Critical patent/WO2014012241A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
    • G01R15/148—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop involving the measuring of a magnetic field or electric field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers

Definitions

  • the current current sampling uses the structure of a through-core current transformer.
  • This measurement method requires the conductor to pass through the center of the closed magnetic medium of the transformer to quantify the magnetic field around the path to characterize the current.
  • the requirements for the measurement structure and measurement method of the core-through current mutual inductance make the use of the current transformer limited by the shape and position of the conductive cable, and the size of the electrical equipment to which it belongs is large.
  • the conventional structure of the core current mutual inductance has a limit on the maximum value of the current to be measured, and the internal magnetic sensitive elements have magnetic saturation.
  • the output signal strength of the closed core-through current mutual inductance structure cannot be output in a consistent proportion with the magnitude of the measured current (the output characteristic curve is not a straight line).
  • the capacity of the electromagnetic current exchange inside the conventional current transformer is large, and its weight volume cannot be reduced.
  • the measuring structure and measuring method of the NB type side-mounted current mutual inductance do not require a magnetic medium to surround the conductive cable within a certain distance of the side of the measured electrical conductor.
  • the measurement method and measurement structure of the side-mounted current mutual inductance are not limited by the shape and position (shape and position) of the conductor to be tested, and the volume and weight of the sensor itself and the volume of the device according to the measurement structure and measurement method of the side-mounted current mutual inductance. The weight is several times smaller than the conventional one.
  • the measurement structure and measurement method of the NB type side current mutual inductance are not magnetically saturated, and the measurement range is not limited by the power of the device itself, so the measured output signal and the measured current intensity are output in a uniform ratio (the output characteristic curve is a straight line).
  • the method utilizes a linear relationship between the magnetic field strength on the side of the conductive cable and the current intensity in the conductive cable, and extracts the magnetic field strength of the side of the conductive cable by the side mutual inductance element to achieve sampling and characterization of the current intensity in the conductive cable. the goal of.
  • the method of characterizing the current intensity in the conductive cable by using the measurement of the entire circumferential magnetic line around the conductive cable is broken.
  • the side-mounted current mutual inductance structure and measurement method do not require a conductive cable to pass through the center of the measuring device, and only need to be placed on the side of the cable to perform current measurement method for current intensity measurement.
  • the side-mounted current mutual inductance measurement structure and measurement method fundamentally facilitate the installation of the current mutual inductance component, and facilitate the flexible setting of the detection point, and at the same time, the non-core-through mutual inductance component can be reduced in volumetric weight relative to the core-through type. Times.
  • Figure 1 shows the power cable.
  • Figure 2 shows a side-mounted current mutual inductance component.
  • Figure 3 shows the mounting structure of the side-mounted current mutual inductance element.
  • the current of the conductive cable can be detected by placing the side-mounted current mutual inductance component within a certain distance of the side of the conductive cable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

A side-mounted current transform measuring structure and measuring method. A current transforming element is installed in a certain distance beside a measured conductor, and a magnetic dielectric is not required to surround a conductive cable. The side-mounted current transform measuring structure and the measuring method are not limited by a shape and a position of the conductive cable, so that the current transforming element does not have magnetic saturation inside, and a measurement range is not limited by self power of the device, so a measurement output signal and measured current intensity are output proportionally, and an output characteristic curve is a straight line. In the side-mounted current transform measuring structure and the measuring method, the current intensity may be measured by side-mounting the measuring device beside the conductive cable without requiring that the conductive cable passes through a center of the measuring device.

Description

侧置式电流互感的测量结构和测量方法 技术领域  Measurement structure and measurement method of side-mounted current mutual inductance
电力电子。  Power Electronics.
背景技术 Background technique
当前电流采样采用穿芯式电流互感器的结构， 这种测量方法需要导电体从互感器的封闭 磁介质中心穿过从而对道题周围磁场量化以达到表征电流的目的。 这种穿芯式电流互感的测量结构和测量方法的要求使得电流互感器的使用受到了导电线 缆形状和位置的限制， 所属的电器设备尺寸较大。 而且穿芯式电流互感的传统结构对被测电 流的最大值有限制， 其内部磁敏感元件均有磁饱和现象。 同时这种封闭的穿芯式电流互感结 构的输出信号强度不能随被测电流的大小变化按一致的比例输出 （输出特性曲线不是直线）。 而且传统电流互感器内部需要电磁交换的容量较大， 其重量体积不能减小。  The current current sampling uses the structure of a through-core current transformer. This measurement method requires the conductor to pass through the center of the closed magnetic medium of the transformer to quantify the magnetic field around the path to characterize the current. The requirements for the measurement structure and measurement method of the core-through current mutual inductance make the use of the current transformer limited by the shape and position of the conductive cable, and the size of the electrical equipment to which it belongs is large. Moreover, the conventional structure of the core current mutual inductance has a limit on the maximum value of the current to be measured, and the internal magnetic sensitive elements have magnetic saturation. At the same time, the output signal strength of the closed core-through current mutual inductance structure cannot be output in a consistent proportion with the magnitude of the measured current (the output characteristic curve is not a straight line). Moreover, the capacity of the electromagnetic current exchange inside the conventional current transformer is large, and its weight volume cannot be reduced.
发明内容 Summary of the invention
NB型侧置式电流互感的测量结构和测量方法在被测导电体旁侧的一定距离内， 不需要磁 介质围绕导电线缆。 这种侧置式电流互感的测量方法和测量结构不受被测导体的形状和位置 (形位） 的限制， 根据侧置式电流互感的测量结构和测量方法的传感器自身体积重量和所属 设备的体积和重量都较传统型减小了数倍。而且 NB型侧置电流互感的测量结构和测量方法没 有磁饱和， 测量范围不受器件自身功率的限制， 因而其测量输出信号与被测电流强度按一致 比例输出 （输出特性曲线为直线）。 此方法利用导电线缆旁侧的磁场强度与导电线缆内的电流强度的线性关系， 以旁侧互感 元件提取导电线缆旁侧某点磁场强度以达到对导电线缆内的电流强度采样表征的目的。 从而 突破了目前采用导电线缆周围整个圆周磁力线的测量而表征导电线缆内电流强度的方法。 侧置式电流互感结构和测量方法无须导电线缆穿过测量器件的中心， 只需侧置于电缆旁侧而 进行电流强度测量的电流测量方法。 侧置式电流互感测量结构和测量方法从根本上方便了电流互感元件的安装， 便于灵活设 置检测点， 同时也使得这种非穿芯的互感元件可以从体积重量上相对于穿芯式减少 5 8 倍。 The measuring structure and measuring method of the NB type side-mounted current mutual inductance do not require a magnetic medium to surround the conductive cable within a certain distance of the side of the measured electrical conductor. The measurement method and measurement structure of the side-mounted current mutual inductance are not limited by the shape and position (shape and position) of the conductor to be tested, and the volume and weight of the sensor itself and the volume of the device according to the measurement structure and measurement method of the side-mounted current mutual inductance. The weight is several times smaller than the conventional one. Moreover, the measurement structure and measurement method of the NB type side current mutual inductance are not magnetically saturated, and the measurement range is not limited by the power of the device itself, so the measured output signal and the measured current intensity are output in a uniform ratio (the output characteristic curve is a straight line). The method utilizes a linear relationship between the magnetic field strength on the side of the conductive cable and the current intensity in the conductive cable, and extracts the magnetic field strength of the side of the conductive cable by the side mutual inductance element to achieve sampling and characterization of the current intensity in the conductive cable. the goal of. Thus, the method of characterizing the current intensity in the conductive cable by using the measurement of the entire circumferential magnetic line around the conductive cable is broken. The side-mounted current mutual inductance structure and measurement method do not require a conductive cable to pass through the center of the measuring device, and only need to be placed on the side of the cable to perform current measurement method for current intensity measurement. The side-mounted current mutual inductance measurement structure and measurement method fundamentally facilitate the installation of the current mutual inductance component, and facilitate the flexible setting of the detection point, and at the same time, the non-core-through mutual inductance component can be reduced in volumetric weight relative to the core-through type. Times.
附图说明 DRAWINGS
图 1为电力电缆。 图 2为侧置式电流互感元件。 图 3为侧置式电流互感元件的安装结构。  Figure 1 shows the power cable. Figure 2 shows a side-mounted current mutual inductance component. Figure 3 shows the mounting structure of the side-mounted current mutual inductance element.
具体实施方式 detailed description
将侧置式电流互感元件放置在导电线缆的旁侧一定距离内即可检测导电线缆的电流。  The current of the conductive cable can be detected by placing the side-mounted current mutual inductance component within a certain distance of the side of the conductive cable.

Claims

权利要求书 Claim
PCT/CN2012/078919 2012-07-17 2012-07-20 Side-mounted current transform measuring structure and measuring method WO2014012241A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/078919 WO2014012241A1 (en) 2012-07-17 2012-07-20 Side-mounted current transform measuring structure and measuring method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNPCT/CN2012/071711 2012-07-17
PCT/CN2012/078919 WO2014012241A1 (en) 2012-07-17 2012-07-20 Side-mounted current transform measuring structure and measuring method

Publications (1)

Publication Number Publication Date
WO2014012241A1 true WO2014012241A1 (en) 2014-01-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106160879A (en) * 2015-04-11 2016-11-23 宁远 A kind of ground wire communication means and system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2266132Y (en) * 1996-07-18 1997-10-29 介国安 Current transducer
CN1165954A (en) * 1996-05-17 1997-11-26 介国安 Current sensor
CN201918253U (en) * 2010-12-13 2011-08-03 士林电机（苏州）电力设备有限公司 Electric current mutual inductor
CN202134397U (en) * 2011-07-27 2012-02-01 珠海市丰兰实业有限公司 Transformation ratio adjustable type current mutual inductor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1165954A (en) * 1996-05-17 1997-11-26 介国安 Current sensor
CN2266132Y (en) * 1996-07-18 1997-10-29 介国安 Current transducer
CN201918253U (en) * 2010-12-13 2011-08-03 士林电机（苏州）电力设备有限公司 Electric current mutual inductor
CN202134397U (en) * 2011-07-27 2012-02-01 珠海市丰兰实业有限公司 Transformation ratio adjustable type current mutual inductor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106160879A (en) * 2015-04-11 2016-11-23 宁远 A kind of ground wire communication means and system
CN106160879B (en) * 2015-04-11 2018-08-31 宁远 A kind of ground wire communication means and system

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